Compact Universal Timing Endpoint Based on White Rabbit with Dual Ports
Introduction
The CUTE-WR-DP is the enhanced version of CUTE-WR with dual WR ports.
There are three function mode for CUTE-WR-DP.
Normal WR node*
In this mode, CUTE-WR-DP acts as a normal WR node with one SFP port(SFP0).
Chain mode(CUTE-WR-DP-CM)*
In CM mode, two ports act as one down-link(SFP1) and one up-link(SFP0) to support cascade topology. Two ports also support simple switch function for normal Ethernet packets.
Parallel mode (CUTE-WR-DP-PM)*
In PM mode both port act as down-link port connect to different WRS, provide redundancy to improve the relibility for safety related applications. Current firmware doesn't support this function.
Hardware
/5985
CUTE-WR-DPV2.3*
Hardware Features:
- 3.3v power supply, 1.5A
- VITA57 FMC mezzanine
- Two WR compatible SFP sockets
- Spartan 6 (XC6SLX45T-4CSG324C)
- 32MBit SPI FLASH (M25P32-VMF6P)
- 64Kbit I2C EEPROM (24AA64T-I/MC)
- FMC LPC interface following the VITA standard
- JTAG connector
- USB-UART port
- External CLK reference (work in master mode)
- Adjustable CLK output (optional)
- 2 USER IO on front panel, LEMO interface
- 2 front panel LEDs
Firmware
The firmware is based on WRPC with modified code in the LM32 softcore.
The additional resource cost to support Dual Port is not twice of the
single port.
Project information
CUTE-WR-DPV2.3, Hardware design files
Normal WR Node*
Latest published
firmware:bit,
flash
Previour firmware version can be found at published
firmware
Firmware design
files,
branch hm-cute. Project directory syn/cute_ref_design/.
LM32 software
code,
branch hm-cute.
Cascaded WR Node*
Latest published
firmware:bit,
flash
Previour firmware version can be found at published
firmware
Firmware design
files,
branch hm-cute-dp. Project directory syn/cute_dp_ref_design/
LM32 software
code,
branch hm-cute-dp.
There are Cascaded WR Node Demo. Follow the instructions to run the project.
Users list
Converter Control Electronics group at CERN
Ruke elec (a time&frequency device supplier in China)
Contacts
Commercial producers
SyncTechnology - a spinoff company from THU
General question about project
- Guanghua Gong - Tsinghua University, Beijing
Status
Date | Event |
26-Mar-2014 | Start of project. Conceptual Idea. |
25-Jan-2017 | Hardware verified |
25-Jan-2017 | Publish the simple dual port demo |
04-Apr-2017 | Publish the CUTEWR-DPV2.2 |
10-Mar-2018 | 20 Cute-WR-DPV2.2 produced |
06-Nov-2018 | Another 20 Cute-WR-DPV2.3 produced |